Yahoo Finance analysis indicates that while the 'September Effect' historically shows negative average returns for the S&P 500 and Dow Jones Industrial Average, it does not reliably signal a crash or correction for AI chip stocks. The analysis notes that in 2025, the VanEck Semiconductor ETF (SMH) gained 12% and the iShares Semiconductor ETF (SOXX) soared 11% in September, demonstrating that strong earnings, falling interest rates, and insatiable demand for AI compute can override this seasonal pattern. In 2023, both ETFs dropped about 7%, and in 2024, they finished flat. The report advises investors not to dump chip stocks but to manage volatility, suggesting ETFs like SMH and SOXX for diversified exposure.